CISinks 4 Pack HP 934XL 935XL High Yield Remanufactured Ink Cartridges (1x Black, 1x Cyan, 1x Magenta, 1x Yellow) for Hewlet Packard Officejet Pro 6230 6830 6835 Officejet 6812 6815 6820 HP934 HP935 Compatible with: HP Officejet Pro 6230 6830 6835, Officejet 6812 6815 6822 Remanufactured with New Chip, Printer will monitor ink levels 4 Pack (1x Black, 1x Cyan, 1x Magenta, 1x Yellow) 2-Year Shelf Life